March 22, 2011 Mauro Pivi SLAC ALCPG11 Eugene Oregon March 19-23, 2011 Working Group plans

March 22, 2011 Characterization of electron cloud at different bunch spacing: 6ns and 3ns. SynRad3D simulations for baseline DR –antechamber under testing –Include photoelectron model Build-up simulations for the baseline DR –with photoelectron distribution by Synrad3D Instability simulations for the baseline DR Write Report on Mitigation Recommendation ILC DR e- cloud Working Group Plans Mauro Pivi SLAC, ALCPG11 Workshop March 2011

March 22, 2011 The Working Group gave a preliminary recommendation for mitigations in October It would be good to make the Executive Summary available for the ILC community: ILC EDMS, Cornell Wiki site, SLAC-PUB, Report Document on Mitigations and Recommendation for ILC DR Mauro Pivi SLAC, ALCPG11 Workshop March 2011

March 22, 2011 IPAC11 paper Then, write a full report produced by the Working Group by September 2011, including: the description of mitigations, the research work, the description of the recommendation process and the recommendation for electron cloud mitigations. Submit to journal?! Report Document on Mitigations and Recommendation for ILC DR Mauro Pivi SLAC, ALCPG11 Workshop March 2011

March 22, Introduction, 5 [?] 1.1Request from AAP, 3 [?] 1.2Working Group, Charges, Deliverables and Milestones, 5 [Guiducci] 1.3Test Facilities contribution to DR 20 [Palmer] 2.0Introduction of the Electron Cloud effect 10 [Furman] 3.0Overview of Electron Cloud Mitigations [Pivi/Palmer] 3.1 Solenoid 10[Kanazawa/Pivi] 3.2 TiN coating10 [Pivi/Suetsugu/Calvey] 3.3 Carbon coating 10 [Calatroni/ Palmer] 3.4 NEG coating 10 [Malishev/Palmer] 3.5 Coating and impedance[Papaphilippou] 3.6 Grooves and Impedance 10 [Suetsugu/Pivi/Calvey] 3.7 Clearing Electrodes and Impedance 10 [Suetsugu/Billing] 3.8 Conditioning 10[Suetsugu/Li] 3.9 Single-bunch Feedback system 10 [C. Rivetta] 3.95 Other mitigations (more or less mature) 8 [Palmer]  Report Document on Mitigations and Recommendation for ILC DR

March 22, Simulations [Pivi] 5.1DR layout and parameters, 10 [Guiducci] 5.2Photon and Photoelectron Production, 10 [Harkay, Dugan] 5.3Build-up simulations Simulation in dipoles and drifts 10 [Furman] Simulation in wigglers 10 [Demma] Simulation in quads and sexts 10 [Wang] 5.4Single-bunch instability simulations 10 [Pivi] Report Document on Mitigations and Recommendation for ILC DR

March 22, Recommendation for the baseline and alternate solutions for the electron cloud mitigation in various regions of the ILC Positron Damping Ring 8.1Set of criteria for a decision, 5 [Pivi] 8.2Mitigation costs, 3 [Suetsugu / Palmer] 8.3Reviews and Meetings, 2 [Pivi] 8.4Methodology for Recommendation, 6 [Pivi] 8.5 Mitigations recommendation: [Pivi/Palmer/Guiducci] Dipole regions, Wiggler regions, Drift regions, Quadrupole regions, 5 9.0Summary 5 [Pivi] Report Document on Mitigations and Recommendation for ILC DR

March 22, 2011 WG Main Deliverables Recommendation for the reduction of the ILC Positron Damping Ring Circumference Recommendation for the electron cloud mitigation in various regions of the ILC Positron Damping Ring. Done March 2010 Done October 2010 Characterization of electron cloud at different bunch spacing: 6ns and 3ns Done October 2010 Report on Recommendation for Mitigations ~January 2012 Mauro Pivi SLAC, ALCPG11 Workshop March 2011